Blindstitch sewing machine



May 25,1926. 1,585,676

H. 'C. MOULTON BLINDSTITCH SEWING MACHINE Filed May 6. 1924 -4 Sheet-s$heet 1 l l I 3 (a if, I F. 0 "I, I'll-- a-i 2 I 22 lnvehrort.

Harley C. Mou\Ton May 25 1926. 1,585,676

' H. c. MQULTON BLINDSTITCH SEWING MACHINE Filed May 6. 1924 4 Sheets-Sheet 2 Fig.2.

E i l I V lnvenTor.

Hurley QMqul-Ton May 25 1926.

H. C. MOULTON BLINDSTI'ICH SEWING MACHINE 4 Sheets-Sheet 5 Filed May 6 1924 AYTys.

lnven Tor. Hurley C-.:MoulTon b /WJMMZMWz isms May 25 1926.

1,585,676 H. C. MOULTON BLINDSTITCH SEWING MACHINE Filed May 6. 1924 4 Sheets-Sheet 4 lnvenTo r. Hurley C. MoulTon MWMW '34 Afiys.

Patented May 25, 1926.

UNITE.

YATES assassi- HARLEY G. MOULTON, OE MAPLEWOOD, MISSOURI, ASSIGN'OE TO LAWRENCE M. STE'JIN, OF WINNEIKA, ILLINOIS.

BLINDSTITGH SEYVING MACHINE.

- Application filed May 6,

This invention relates to improvements in blind stitch sewing machines for felling a superimposed layer upon a base layer of material and the principal object of the invention is to provide a novel mechanism by means of which the line of stitching connecting the base and superimposed layers may be located at a distance remote from the folded edge of the superimposed layer.

In the manufacture of garments, such as, plain edge coats in which the line of stitch ing along the infolded edge of the coat is omitted, the facing is secured to the outside or body of the coat, or to the stiffening member, by a line of stitching located at a distance remote from the edge of the garment. In the manufacture of such garments heretofore this line of stitching has been made by hand. One of the objects of the present invention is to provide a machine capable of accomplishing this work which has heretofore been done by hand, that is, a machine capable of securing the facing to the body or stiffening member of the coat by a line of blind stitching located at a distance remote from the edge of the coat or other garment.

A further object of the invention is to provide a blind stitch sewing machine in which the layers of a piece of material, which has been folded, may be secured together at such distance from the edge of the fold that the fold may be pressed out to form a plait of any desired width and particularly of SUlilClGllt width to be pressed into the form of a box plait.

A further object of the invention is to provide a blind stitch sewing machine with bender supported upon the bed plate of the machine, so constructed as to engage an rip-turned edge of a superimposed layer, or to engage the superimposed layer within a fold and present the up-turned or folded edge of the layer in the path of the needle.

A further object of the invention is to provide a blind stitch sewing machine for felling a superimposed layer upon a base layer which comprises a bed plat-e, an overhanging arm having a head carrying stitch forming mechanism, feeding mechanism, a presser foot and a yieldable work support extending through the bed plate into cooperative relation with the presser foot to clamp the work therebet-ween, with bender 1924:. Serial No. 711,359.

mechanism supported upon the bed plate and operable simultaneously With, and preferably by, the work support in such a manner that when the work support is depressed from clamping relation to the presser foot the bender will be simultaneously moved out of operative position in order to facilitate the introduction and removal of the work.

A further object of the invention is to provide a machine of the character above described with a removable work supporting table carrying a bender of the character above described so that the machine may be capable of being used for ordinary felling or paddin or may be employed to do the special kinds of work above described.

A further object of the invention is to provide novel means for supporting the work as it passes from the work supporting table to the yieldable work support which co-operates with tl e presser foot. This is accomplished by providing a bridge which is pivotally connected at one end to the table and at its other end to the work support.

A further feature of the invention consists in providing a bridge of this character with means which will enable the operator to retard the feed of the base layer in order to preventwrinkling or checking of the goods where line material is operated upon and the material advanced by an upper feeding mechanism.

Other objects and features of the invention will more fully appear from the following description and the accompanying drawings and will be particularly pointed out in the claims.

, A preferred embodiment of the invention is disclosed herein associated with a sewing machine of the well known Ar. type and more particularly with the set 3 machine disclosed in my prior Patents umbers 1,469,675 and 1,469,676, granted October 2, 1928 respectively for improvements in work presenting mechanism for sewing machines and feeding mechanism for sewing inachiues. The work table which is illus trated in the accon'ipanying drawings and upon which the bender mechanism is mounted may be and desirably is of the general form disclosed in my prior Patent Number 1,4138,-

granted December 152, 1922. it will; however, be understood that the invention i a ma oe iateu 7 Lo. .thcr t pe" particular In the do. awings: l l is an end elevation, partl broken away and partly in section, of a sullicient portion oi a sewing machine to show the manner in which the present invention is associated therewith;

i ig. is a plan view of the work table and bender mechanism and also illustrating in plan the presser toot removed from its support upon the head or the machine;

Fig. 3 is a front elevation of the table and bender mechanism mounted upon the bed plate of the sewing machine, the bed plate being shown in section, and also illustrating in elevation the work support, the means for depressing the same, and other parts of the machine located beneath the bed plate;

Fig. 4 is a detail view of the work supporting table and bender mechanism viewed from the right toward the left;

Fig. 5 is a detail front elevation of the presser foot nd bender mechanism for the superimposed layer, illustrating the manner in which the same is carried by the work supporting table, a. portion of which is shown in section;

6 is an UIlClGISltE olan view of the presser toot, also illustrating in full lines a portion of the bender in operative relation to the guide and presser foot and showing in dotted lines the bender removed from operative position to facilitate the introduc tion and removal of the work; and,

Fig. 7 is a vertical sectional view through the presser foot in a plane parallel to the line or stitching and viewed from the left toward the right.

The sewing machine illustrated in the ac coi'npanying drawings comprises a bed plate 1 from which rises an overhanging arm 2 having a head 8 which carries a vibrating and reciprocating preferably curved oscillating needle 4, complemental stitch forming mechanism, such as, a rotary bobbin-containing hook 5, a presser foot 6, a feed dog 7 and means for actuating these various mechanisms which, being well known, need not be described herein. A yielding work support 8 co-operates with the presser foot to clamp the work therebetween and the feed dog 7 also co-operates with the work support in advancing the work in a well known manner. The work support 8 is fixedly secured upon the upper end of a hollow stem 9 which is slidably mounted in a tubular standard 10 which is slidably mounted in a bracket 11 which depends from the under surface of the bed plate 1. The hollow stem 9 is provided with opposite guide slots 12 which receive the cylindrical ends of screws 13 which are seated in the wall of the standard 10 and the work support is normally sustained in elevated position to co-operate with the presser foot 6 by a helical spring lei which bears its pper end upon the under wall of the work support and is seated at its lower end upon a sup- 'lhe tubular standard 10 is normally held in elevated position by a collar 19 which is secured to the standard and is provided with a hollow boss 20 which receives the upper end oi a helical spring 21, the lower end or which is seated in a socket in an adjusting screw in the arm 11 of the supporting bracket. The boss 20 is provided with a transverse rib :23 which extends across its top and is engaged by a depressing lever which is pivotally mounted at one end upon a stud 25 upon the depending bracket for the work support. The free end of the le ver 2 l is engaged by the overlying end a iever which is secured to a shaft 27 mounted in suitable bosses extending downwardly from the bed plate 1 and the shalt 21'' has lined to it a downwardly extending arm to which is secured an arm 29 adapted to be actuated by the knee of the operator. 'lhus when the arm 2%) is forced laterally (to the right) the lever 26 will be swung downwardly and will depress the lever and thereby, actin through the 'ib 23 on the collar 20, will depress the tubular standard 10 and remove the work support from work clai'nping position.

The lower end of the bender stem 17 is secured to a cross head 30 which is reciprocably mounted in the tubular standard 10 and is provided with a transverse slot which receives the rounded end 81 of a bender actuating arm 32 which is oscillated in timed relation to the action of the stitch forming mechanism in a manner well known and which need not be further described.

The particular bender mechanism and other mechanisms above referred to are il ully described in the prior patents hercto'torc mentioned.

in usual types of blind stitch sewing inachines oi? the Arbettei type the edge of the superimposed layer is guided in parallelism with the path of the needle and adjacent thereto and the base layer is presented in the path of the needle by the lower bender which operates through the work support, while the under face or edge portion of the superimposed ayer is presented in the path or the needle either by a guide upon the presserioot or by a bender carried by the presser foot,

One of the objects of tie present invention is to provide a e bender mechanism for the superimposed layer rich will bond till

tion or oscillation of the vibrating needle. Preferably the presser toot is provided with a guide for the tlllllQ(l-llP or folded of the superimposed layer which hes adjacent to or cross-es one oi the paths of oscillation of the needle and co-operates with the bender tor the superimposed layer in such a manner as accurately to insure the proper penetration of the needle into the material of the superimposed layer at or beneath the edge thereof.

The preferred term of presser toot which is illustrated in the accompanying drawings comprises a body portion having a forwardly extendin tee 34 provided with lateral extension 35 having guideways 36 and 37 for the oscillating needle and an upwardly extending edge 38 forming a guide for the edge of the superimposed layer which may be directed into eontact therewith by the hand of the operator.

The presser foot is provided with a pair of up *ardly extending ears 39 and 4Q which are secured to the hook bracket which depends from the sewing machine head The preferred form of guide which is illustrated herein comprises a men'iber ll having a bifurcated lower end the arms and 4-8 of which lie upon opposite sides or the path of the needle 4; as illustrated more particularly in Fig. 7 and the bender is so located as to press the up-turned edge or folded portion of the superimposed layer against this guide intermediate out the arms 42 and 43 so that the needle will pass through the edge portion of the superimposed layer at a predetermined depth of penetration.

It will be understood, however, that other forms of guides may be used or that the render may be employed without a co-opera; ting guide thus to torcethe edge portion or the superimposed layer into the path or the needle.

One of the objects of the invention is to provide means for supporting the bender from the bed plate of the machine instead olmounting it upon the presscr foot in order that the bender mechanism may be readily removed as will. hereinatter more fully up near when other work is to be done upon the sewing machine not requiring the presence of this bender. Furthermore, the novel construction is such that other types of bender such as those supported by a presser toot may be readily used upon the machine.

Any suitable means he provided for supporting the bender the liiedplate the machine. In the present embodiment oi the invention the bender tor the superimposed layer is supported upon a work table which is detachably mounted upon the bed plate so that both the work supporting table and bender can be readily removed when desired. The bender supporting mechanism may, however, be directly mounted upon the bed plate of the machine within the scope of the present invention. 7

The preferred form or work supporting table which is illustrated herein is substantially the same Patent Number 1,438,255 aforesaid and con:- prises a top a l which preferably is located in a lower plane than the normal plane of the work support when the latter is in cooperative work clamping relation to the presser foot and is supported upon vertical front and rear walls 45 and 46 which are connected by and continuous with a side wall 4-7. An integral horizontal extension l8 projects from the lower end of the rear wall 46 and is provided with a downwardly projecting stud 45) having an enlarged head 50 adapted to pass through a key-hole slot in the bed 1 so that when the stem of the stud 49 is moved into the narrow portion of the key-hole slot the stud will anchor the extension 48 to the table. The front wall 45 of the table has a central thickened portion 51 having a vertical slo ther -in which receives an extension or boss 53 forming partof a T-shaped plate 54 the arms of which are secured to the lower ends of the thickened wall 51 by screws 55. An adjusting screw 56, which is threaded through the T-shaped plate 5%, is rotatably connected at its inner end to a post 57 which is pivotally mounted upon a screw or stud 58 mounted in parallel flanges 59 the inner walls of which form eontinuations of the walls of the slot 52 and which serve as guides for preventing lateral movement of the post 57. The lower end of the post is provided with a downwardly extending stud 60 having an enlarged head 61 adapted to pass through an aperture, preferably a key-hole slot 62 in the bed plate, or as illustrated herein in Fig. 3 in a plate 63 which is sunken into and secured to the bed plate.

In order to assemble the table upon the bed plate of the machine the studs 4-9 and 60 are inserted through the key-hole slots in the table and the screw 56 rotated in a direction to move the lower end of the post 57 toward the stud 49, thus causing the heads 50 and ($1 of the studs 4-9 and 60 to engage the walls of the slots or apertures through which the studs extend and lock the table firmly upon tne bed plate.

in order to remove the table from the machine it is merely necessary to unscrew the screw 56 until the heads 50 and (ll of the studs can be raised through the apertures in the table.

The bender mechanism, as illustrated herein, is supported upon the table sothat it also will be removed with the removal of the table. In the preferred embodiment of the invention illustrated the bender is in the form of a long arm or bar 64 having a relatively narrow rearward extension 65 as that shown in my prior 1 terminating in a rounded end 66 to engage the goods. hen in normal position this rninded work engaging end is positioned to co-operate with the guide ll upon the presser foot and preferably is positioned between the arms and 43 01' said guide. The beneer n or bar is supported by suitable 1 means located at a remote dis ance from the which is pivotally supported upon a bracket extending later ally from the e ztension 48 or one stand.

its illust ouer end or the siel'l is provided with a downuuu'dly extending st integral with an underly ing a downwardly extending l i a continuation of the standard 69 i ant coiitinuing rearwardly theret 0m in an a nuate curve. The upper and lower portions of the rear end of the wall are provided with ensi us or bosses i2 1 which are mounted trunnion inn coninhshaped ends adapted to coin lementary sockets in a VGl'lllCa to (it a laterally extending" arni bracket 78 which is provided with a base 79 secured to the Xtension 1-8 of the table by screws 80. The lower trunnion M desirably is threaded and screwed through the low boss 72 of the downwardly extending wall 71 and 1s provided with a head 81 by mans which it may be adjusted. A lock nut 82 upon the screw threaded trunnion 7%,

located intermediate Oil the head 81 and the boss 7:2 serves to lock the trunnion in adjusted position.

A strong helical spring 00, connected at one end to the arm 77 ot the bracket 78 and at its other end to a downwardly extending fian e U)Ol1 the lower shell serves nor- #1 a n'ially to rock the bender supporting stunt about its invotal sun iort in such a manner to place the bender in operative position relatively to the stitching point, and the rotary nioveinent oi? the benoer supporting stand is adjustably limited by i set screw seated in an extension of the arm 77 oi the bracket 78.

Any suitable means may be provided for removing the bender from operative position to permit insertion and removal oi the work. inasmuch as such movement of the bender desirably is eliected sinnntaneously with the depression of the work support,

means are provided by which the depression oi? the work support will also cause the re moval of the lJGlK er. In the construction illustrated, a lever is pivotally inountet at its lower end upon a screw or stud 86 seated in a boss extending downwardly from the racket 78 and is provi led with a cam 87 which receives a stud 88 extending;- l liy iroin the tubular standard 10 of the work support. The upper end of the 'l w 653 extends rcari'ardly and is bit' :1-

cited to receive a link 89 which is pi: tally secured to it by a p1 90. The opposite end ositioi as illustrate re provided to permit dily and thus accomt thicknesses of ma- In the or is provided with a slot 93 site walls oi which embrace z ndiug up ardly from the shell? wer late 95 serves to retain the H i or bar be shoably within the guideways es. An ad usting screw having a inilled head 96 is mounted in the outer end oi the bender an]. the end of the adjusting screw bears against a leaf spring 97 which mounted in a vertical slot in the outside o'l the standard 69 and secured therein by a screw 98 located at a distance from the up r end oi the spring. The hat I 9* is much u"- lrer tlan the spring; wh cl controls the position of r) i l the stand so tl at the bender yierds readily to dili erent thi lrnecses or seams in the niaterial which is being sewed.

In the operation of the machine for blind stitching a superimposed layer upon a base layer. such, for exam ple as required in sewing the facing to the body of a cost at a distance remote from the edge of the coat the base layer or body oi the coat is so pre sentcd to the stitch :lorining mechanism that the edge of the coat extends the required distance into the recess between the upper shelf 68 which supports the bender and the lower shelf 70 of the bender supporting stand. The superimposed layer is folded around the end of the bender and lies above the bender supporting shelf 68. Thus the bender is 10- cated between the layers of the fold of the superimposed layer and engages the superimposed layer within the angle of the fold so that the edge of the fold is pressed by the bender into the path of the needle. Desirably the end of the bender is provided with a slight groove which partially embraces the needle. Thus a proper penetration of the needle into the superimposed layer is 1nsured.

While the bender desirably co-operates with the guide upon the presser foot above described it will be obvious that the same action may be obtained by properly adjust ing the bender without the necessity of the guide although in such case very skillful mahipulation ot the superimposed layer will be required to retain the folded edge of the superimposed layer tightly against the bender.

This bender mechanism may also be employed for the purpose of making plaits in a single piece of fabric by folding the goods to present the desired width of the plant with the edge of the fold extending into the recess under the bender supporting shelf, the goods then being folded again over the bender so that the bender engages within the angle of the upper fold. The upper fold may then be stitched to the lower layer by a seam of blind stitches, the under fold forming the plait. This plait may be made of any desired width so that the goods may be plain plaited, or if desired the plaits thus formed flattened out and pressed to form the box plaits.

Where it is desired to sew an up-turned or folded edge of a superimposed layer upon a base layer the up-turned edge may be directed against the guides 38 and 10 of the presser foot and the bender in such case will act upon the outside of the up-turned folded edge to force the under face thereof into the path of the needle. Thus a seam of blind s-ztitching may be made to secure the edge of the superimposed layer to the base layer in the manner usually performed by the machines of the Arbettel type to which refcrence is above made.

Another feature of the invention consists in providing a bridge for supporting the goods as it passes from the work supporting table to the work support which co-opcrates with the presser foot. In'the present work supporting table construction the top of the table is cut away to provide a recess partially to surround the work support of the sewing machine and an l..-shaped plate 100 is secured to the top of the table along the side and in front of the work support to pr vide smooth surface upon which the goods may be manipulated. A bridge 101 is piv otally connected at its ends to the work support and to the lateral portion 102 of the plate which is directly in front ofthe work,

support, thus providing an inclined way leading from the work supporting table to the work clamping face of the work support.

Any suitable means may be provided for thus pivotally connecting the bridge to the work support and table. In the construction illustrated the laterally extending portion 102 of the plate is provided with a boss 103 and the adjacent end of the bridge 101 is provided with bosses 10 2 upon opposite sides of the boss 103 forming complementary parts of a hinge which are connected by a pintle 105. The bridge 101 has at its opposite end an upwardly curved lip 106 which underlies the forward end of the work support and is clamped thereagainst by a leaf spring 107 which is secured to the under face of the work support by a screw 108. The under face of the work support desirably is provided with a recess 109 to receive the end of the lip 106 and to permit a sliding and pivotal movement between the lip and the work support when the work support is depressed.

In order to assist the operator in controlling the feed of the goods to the work the bridge 101 is provided with a hump 110 located directly in front of the stitching point. This causes the base layer to bend upwardly in advance of the stitching point and facilitates the guiding of the goods to the needle, It also imposes a slight tension upon the goods which insures uniformity of stitching. In order to enable the operator to increase the tension upon the base layer the humped portion of tie bridge is provided with a preferably fiat inclined and roughened surface 111 which extends from about midway of the hump to the side edge of the bridge. By reason. of this construction the manipulation of the goods by the operator is greatly facilitated.

It will be understood that the embodiment of the invention disclosed herein is of an illustrative character and is not restrictive and that various changes in form, construction and arrangement of parts may be made within the spirit and scope of the following claims.

Having thus described the inventioin whatis claimed as new, and desired to be secured by Letters Patent, is:

1. A blind stitch sewing machine for telliprocatingneedle moving in the general direction of the line of stitching and coinpleinental stitch forming mechanism. a guide for directing a turned-up edge of the superimposed layer in the direction of the line of stitching adjacent to the path of the needle and a bender supported upon said bed plate acting continuously to force the turned-up portion of the superimposed layer into the pathofthe needle at the stitching l a superimposed layer of material. upon a base layer comprising a bed plate, a rec point and means acting to present the 1 layer in the path oi? the needle at predetermined intervals.

A blind stitch sewing machine for telling a superimposed layer of material upon base layer con'iprising a bed plate, a cur red oscillating needle and complemental stitch torming mechanism locatet and operating above said bed plate, a guide directing a turned-up edge of the superi npesed layer in the direction of the line o'l stitch ngjacent to the path of the needle and a yieldable bender supported upon said bed plate acting in a direction substantially parallel to said bed plate and normal to the line stitching to force the turned-up edge of the superimposed layer into the path of the needle at the stitching point and means a 't ing to present the base layer in the path of the needle at predetermin d intervals.

A blind stitch sewing machine for telling a superimposed layer material upon a base layer comprising bed plate, a curved oscillating needle and complemental stitch forming mechanism locaterfl and operating above said b d plate a gui le for directing; a turned-up edge ot' the su erim osed layer in the direction of the line oi stitching ad acent to the path of the needle :1 bender supported upon said bed plate acting continuously to force tl'io our red-up portion of the superimposed layer ate the Mil ot the needle at the stitching; point, mt ans for removing said bender from operative position to facilitate the introduction oi the work and means acting to present the base layer in path of the needle predetermined inturnedup edge of the superin'iposed layer in the direction of the line of stir-hing adjacent to the path of the needle, 1 yieldable b nder supported upon said be'l piate acting in a direction substantially parallel to said bed plate and normal to the line of stitching o of the si'iperimto force the turned-up et a posed layer into the path of the needle a" the stitching point and means swinging said bender bodily from op ratire position to facilitate the introduction of the Work and means acting to present the base layer in the path of the needle at pl'e-(lt.-li1l11 l inter-- vals.

A blind stitch sewing lllZiCl'llflC for ing a superimposed layer of material upon a base layer comprising a bed plate. a curved oscillating needle and complemental stitch loaning mechanism located and operating above said bed plate, a guide 5 directing a turnednp edge of the superiin posed laye-- in the direction of the line of stitching adjacent to the path of the needle. :1 bender support pivotally mounted at a distance remote from the line of stitching to permit the Work to extend Well beyond the line of stitching and a bender yieldably mounted on said sup port having a Work engaging end positioned to force the turned-up portion of the superimposed li yer into the path of the needle at the sti;ching point and means acting to present the base layer in the path of the needle atpredetermined intervals.

6. A. blind stitch sewing machine for t lla superimposed layer of material upon a base layer comprising a bed plate, an oscillating and laterally vibrating needle and complemez'ital sti ch forming mechanism located and o'ierating above said oed plate, a guide for directing a turned-up edge of the quperimposed layer in the direction of the line of Yhing adjacent to one of the paths of the no die, a pivotally mounted sender support l. c..ted at a distance remote from the line of stitching to permit the u rl; to extend Well beyond the line oi stitching and abender yieldably mounted upon said work support having l work engaging end positioned to force the turned-up portion of the superimposed layer into the path of the needle at the stitching point and means for swinging said bender support about its pivot to remove the bender from operative posi tion and thereby facilitate the introduction of the Work and means acting to present the base layer in the other patn oi the needle at predetermined intervals.

'7. A blind stitch sewing machine for i'cl ing a superimposed layer of material up: a base layer comprising a curved oseiilat in and laterally vibrating needle and comlemental stitch 'lorniin e' mecl'i'ani n located my above said Work p xn't a press er foot 1 aving a guide for directing a turned-up edge of the SilPQlllDlfJOSBfl layer in the direction oi? the line of stitching iacent to one of the paths of the needle opera intervals.

8. it blind stitch sewing machine for telling' a superimposed layer upon a base layer 0t material comprising a bed plate an o erhanging arm having a head carrying; a curred osclllating needle complen'iental stitch 'fOLllllg mechanism and feeding mechanism. a 151E358? toot rigidly supported upon said head and having a guide for dirooting the turned-up edge portion of the superimposed lay ,1 in the direction. of the line at stitching adjacent to the path of the needle, a yieldable work support extending above the plane of the bed plate and cooperating with said presser foot to clamp the work therebetween, a yieldable bender supported upon said bed plate acting to force the turned-up portion of the superimposed layer into the path of the needle the stitching point, means for dos-casing the work support out oi? work clamping relation to the presser foot and sinuiltaneously operable means for rcmovii'ig the bender irom operative position to "facilitate the insertion and removal of the work.

9. A blind stitch sewing machine for telling a superimposed layer upon a base layer of material comprising a bed plate, an overhanging arm having a head oarrying a curved oscillating needle, complemental stitch forming mechanism and feeding mechanism, a presser toot rigidly supported upon said head and having a guide "for directing the turned-up or go portion of the superimposed layer in the direction of the line of stitching adjacent to the path of the needle, a yieldable work support extending above the plane of the bed plate and cooperating with said prcsser foot to clamp the work therebctween, a work supporting table de'tachably mounted upon said bed plate having a work supporting surface positioned to co-operate with said work support, a bender support pivotally mounted upon said table and having bender presenting a work engaging end positioned to engage the turncdup portion of the superimposed layer and resilient means acting upon said bender support to hold the bend-er norn'ially in work engaging position.

10. A blind stitch sewi machine for telling a superimposed layer upon a base layer of material comprising a bed plate, an overhanging arm having a head carrying a curved oscillating needle, coinplementul stitch forming mechanism and feeding mechanism, a prcsser ioot rigidly supported upon said head and having a guide for oirecting the turned-up edge portion of the superimposed layer in the direction of the lineoif stitching adjacent to the path oi the needle, a yieldable work support extending above the plane oi the bed plate and co-operating with said presscr foot to clamp the work therebetween, a work supporting table dctachably mounted upon said bad plate having a work supporting surface petitioned to co-operate with said work support, means for depressing the work support away from work clamping relation to said presser foot, a bender support pivotaliy mounted upon said table and having a bender presenting a work engaging end positioned to engage the turned-up portion of the superimposed layer, resilient means acting upon said bender support to hold the bender normally in work -engaging position and means oper- ,eve

able by the depression of the work support to swing the bender support about its pivot and thereby remove the bender from operative position to facilitate the introduction oi? the work.

11. A blind stitch sewing machine for tie] ling a superimposed layer upon a base layer of i'i'iaterial comprising a bed plate,

an overhanging arm having a head carrysitioncd to co-operate with said work support, means for depressing the work support away from work clamping relation to said presser foot, a stud on said work sup port and means including a lever pivotally mounted on said table and connected to said bender sup 'iort and having a cam slot engaging said stud operable to swing the bender support about its pivot away from and into operative position in synchronisni with like movements of the work support when noved away from and into work clamping relation.

12. A blind stitch sewing machine tor telling a superimposed layer upon a base layer oi? material comprising a bed plate, an overhanging arm having a head carrying a curved oscillating needle, complemental stitch forming mechanism and feeding mechanism, a presser toot rigidly supported upon said head and having a guide for directing the turned-up edge portion of the superimposed layer in the direction oi the line of stitching adjacent to the path of the needle, a yieldable work support extending above the plane of the bed plate and cooperating with said presser foot to clamp the work thercbetween, a work supporting table detachably mounted upon said bed plate having a work supporting surface to co-operate with said work support, a bender supporting stand pivotally mounted upon said table and presenting a recess to permit the work to extend well beyond the position of the line of stitching, means for holding the stand normally in operative position, a bender slidably mounted upon said stand having an end portion to engage the turnedup portion of the superimposed layer at the stitching point and resilient means acting upon said bender to hold it in work engag ing position.

' 18, blind stitch sewing machine for telling a superimposed layer upon a base ayer of material comprising a bed plate, an overhanging arm having a head carrying;- a curved oscillating needle, complemental stitch forming mechanism and "feeding mechanisn'i, a presser toot rigidly supported upon 'd head and having a guide for direct ng the turned-up edge portion of the superimposed layer in the direction of the line ot stitching adj acont to the pa the ell Of needle, a yieldable work support extending above the plane of the bed plate and co operating; with said presser foot to cla up the work therebetween, a work supporting table detachably mounted upon said bed plate having; a w rk supporting, surface to co-o izerate with said work support, a bender supportingstand pivotally mounted upon said table and presenting a recess to permit "ork to extend well beyond the position the line of stitching, means for holding e stand normally in operative position, a uder slidably mounted upon said stand raving an end portion to engage the turnedup portion oi the superimposed layer at the stitching point, resilient means acting upon said bender to hold it in work en 'aging position and means intermediate or said bender and resilient means for adjusting the force with which the bender engages the supcrin'iposed layer.

14.11 blind stitch sewing machine for telling", upon a base layer, a superimposed layer of n'iaterial which is folded to present an edge, conunising a bed plate, a curved needle oscillating in the general direction of the line of stitching and compleincntal stitch forming mechanism located and operating above said bed plate, and means interposed between the layers of said fold engaging' the superin'iposed layer within the angle of the fold and acting to present the edge of said superin'iposed layer in the path of the needle.

A blind stitch sewing machine for upon a las layer, a superimposed layer of material whirh is folded to present an edge, comprising a bed plate, a curved needle oscillating in the general direction of the line of stitching and complementi-il stitch forming mechanism located and operating above said bed plate, a slid-ably mounted yieldable bende interposed between the layers of said told engaging the superimposed layer within the angle of the fold and acting continuously to present the edge of the superimposed layer in the ath of the needle.

16. A blind stitch sewing, machine for telling, upon a base layer, a superimposed ayer of material which is folded to present an edge comprising a bed plate, a curved needle oscillating in the general direction of the line of stitching and coinplenien a1 stitch formingmecha nisnilocated and operating above said bed plate, a slidablr mounted yieldablc bender interpos tween the layers of said told engaging the Sl'lPGI'lIDPOSGCl layer within the angle o't th fold and. acting continuously to present the edge of the superimposed layer in the. path at the needle and means for bodily swine; ing the bender from operative posi ion to facilitate th introduction and removal the work.

11A blind stitch sewing machine for telling, upon a base layer, a superimposed layer of material which is folded to present an edge, comprising a bed plate, an oic hanging arm having a head carrying a c. rved oscillating needle and complemental stitch Forming mechanism, feeding mechan' 111 and a presser toot provided with a guide for directing the folded edge of the superimposed layer in the direction of the line of s'itching and adjacent to the path 01' the needle, a yieldable work support e3-1- tending above the bed plate and co-operating with the presser foot to clamp the work therebetween, a work supporting table detachably mounted upon said bed plate having a laterally extending bracket, a stand pivotally mounted on said bracket ing a standard remote from the line of stitching and an overhai'iging shell"- lying substantially in the normal plane (it the work support, a bender mounted upon said shelf, resilient means acting upon stand to swing, said bender into co-opera elation with said edge guide at the stitchng point and thereby to force the 't'olded edge oif the superimposed layer into the path of the needle.

18. A. blind stitch sewing machine ion felling, upon a base layer, a superiu'iposed layer of material which is folded to present an eege, comprising a bed plate, an overhanging arm having a head carrying a curvee oscillating needle and coinplcniental stitch forming inechanisn'i, feeding mechanism and a presser foot provided with a guide tor directing the folded edge of the superimposed layer in the direction oi the line of stitching and adjacent to the p th of the needle, a yieldable work support extending above the bed plate and co-operating with tne presser foot to clamp th work therebetween, a work supporting table detachably mounted on said bed plate having: a laterally extending bracket, a stand pivotally mounted on said bracket having a standard remote from the line of stitching, an overhanging shelf lying substantially in the normal plane of the work support, a bender yieldably mounted on said shelf, resilient means actin upon said stand to swing said bender into co-operative relation with said edge guide at the line of stitching and adjustable means for limiting the swinging movement of the stand.

19. A. blind stitch sewing machine for felling, upon a base layer, a superimposed layer of material which is folded to present an edge comprising a bed plate, an overhanging arm having a head carrying a curved oscillating needle and complemental stitch forming mechanism, feeding mechanism and a presser foot provided with a guide for directing the folded edge of the superimposed layer in the direction of the line of stitching and adjacent to the path of the needle, a yieldable work support extending above the bed plate and co-operating with the presser foot to clamp the work therebctween, a work supporting table detachably mounted on said bed plate having a laterally extending bracket, a stand pivotally mounted on said bracket having a standard remote from the line of stitching, an overhanging shelf lying substantially 1n the normal plane of the work support, a bender slidably mounted upon said shelf, a spring acting upon said stand to swing said bender into co-operative relation with said edge guide, adjustable means for limiting the swinging movement of said stand and a spring, relatively lighter than the standactua-ting spring, engaging said sliding bender and acting to press the end thereof into engagement with the fold of the su perimposed layer.

20. A blind stitch sewing machine for felling, upon a base layer, a superimposed layer of material which is folded to present an edge comprising a bed plate, an overhanging arm having a head carrying a curved os cillating needle and complemental stitch forming mechanism, feeding mechanism and a presser foot provided with a guide for directing thefolded edge of the superimposed layer in the direction of the lme of stitching and adjacent to the path of the needle, a yieldable work support extending above the bed plate and co-operating with the presser foot to clamp the work therebetween, a work supporting table detachably mounted on said bed plate having a laterally extending bracket, a stand pivotally mounted on said bracket having a standard remote from the line of stitching, an overhanging shelf lying substantially in the normal plane of the work support, a bender slidably mounted upon said shelf, a spring acting upon said stand to swing said bender into co-operative relation with said edge guide, adjustable means for limiting the swinging movement of said stand and a spring, relatively lighter than the standactuating spring, engaging said sliding bender and acting to press the end thereof into engagement with the fold of the superimposed layer and adjusting means interposed between said bender and its spring.

21. A blind stitch sewing machine for felling, upon a base layer, a superimposed superimposed layers respectively in the path of the needle, a work supporting table mounted upon said bed plate having a work supporting surface located below the normal plane of the work support and a bridge located in front of the work support pivotally connected at its ends respectively to the work support and to the table.

22. A blind stitch sewing machine for felling, upon a base layer, a superimposed layer of material which is folded to present an edge comprising a bed plate, an overhanging arm having a head carrying a curved oscillating needle and complemental stitch forming mechanism, feeding mechanism and means for presenting the base and superimposed layers respectively in the path of the needle, a work supporting table mounted upon said bed plate having a work supporting surface located below the normal plane of the work support and a bridge having a humped upper surface located in front of the work support and pivotally connected at its ends respectively to the work support and to the table.

23. A blind stitch sewing machine for felling, upon a base layer, a superimposed layer of material which is folded to present an edge comprising a bed plate, an overhanging arm having a head carrying a curved oscillating needle and complemental. stitch forming mechanism, feeding mechanism and means for presenting the base and superimposed layers respectively in the path of the needle, a work supporting table mounted upon said bed plate having a work supporting surface located below the normal plane of the work support and a bridge having an upper surface presenting a hump with a roughened laterally inclined surface extending from the central portion thereof downwardly beneath the path of the base layer to permit the operator, by pressing the base layer upon said roughened portion, to retard the feed of said base layer.

24. A blind stitch sewing machine for felling, upon a base layer, a superimposed layer of material which is folded to present an edge, comprising a bed plate, an overhanging arm having a head carrying a curved oscillating needle and complemental stitch forming mechanism and feeding mechanism and a presser foot provided with a guide for directing the folded edge of the superimposed layer in the direction of the line of stitching and adjacent to the path of the needle, means for presenting the base and superimposed layers respectively in the path of the needle, a work supporting table detachably mounted upon said bed plate having a Work supporting surface located below the normal plane of the Work support and abridge hinged at one end to the table and piv'otally and detaehably connected at its other end to the Work support.

25. A blind stitch sewing machine for fellinggupon a base layer, a superimposed layer of material which is folded to present an edge, comprising a bedplate, an overhanging arm having a head carrying a curved oscillating needle and complemental stitch forming mechanism and feeding mechanism and a presser foot provided with a guide for directing the folded edge of the superimposed layer in the direction of the line of stitching and adjacent to the path of the needle, means for presenting the base and superimposed layers respectively in the path of the needle, a Work supporting table detaehahly mounted upon said bed plate having a Work supporting surface located l'lGllT-JV the normal plane of the Work support, a bridge hinged at one end to the table and provided at its other end with a lip underlying the front end of the Work support and a spring clamp for holding said lip in engage ment with the under side of the Work sup port.

In testimony whereof, I have signed my name to this specification.

HARLEY G. M0 ULTO I. 

